/*
 * This is Melet, a salary slip designer. Feed it with data regarding to salary payment, prepare it for print through the graphical presentation, and you have it done.
 * Copyright (C) 2014, AFDiaX
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This program is based on UMLet, a Free UML Tool for Fast UML Diagrams.
 * To contact the authors of UMLet visit https://code.google.com/p/umlet/people/list
 * To contact the authors of Melet visit https://gna.org/users/gabocze
 */
package com.baselet.element.old.custom;

import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import com.baselet.control.util.Path;
import com.baselet.control.util.Utils;

public class FileClassLoader extends ClassLoader {

	public FileClassLoader() {
		super();
	}

	public FileClassLoader(ClassLoader parent) {
		super(parent);
	}

	@Override
	protected Class<?> findClass(String className) throws ClassNotFoundException {
		Class<?> c = null;
		try {
			byte[] data = loadClassData(className);
			c = defineClass(className, data, 0, data.length);
			if (c == null) {
				throw new ClassNotFoundException(className);
			}
		} catch (IOException e) {
			throw new ClassNotFoundException(className, e);
		}
		return c;
	}

	private byte[] loadClassData(String className) throws IOException {
		File f = new File(Path.temp() + className + ".class");
		byte[] buff = new byte[(int) f.length()];
		FileInputStream fis = new FileInputStream(f);
		DataInputStream dis = new DataInputStream(fis);
		dis.readFully(buff);
		dis.close();
		Utils.safeDeleteFile(f, false);
		return buff;
	}
}
